Jon Hamm has already admitted he got teary while filming the final episode of Mad Men, so it's only natural the actor might hope to find comfort in the advice of someone who'd been through a similar experience.

Unfortunately for Hamm, a fellow AMC veteran gave crystal-clear advice that the path ahead could be rocky.

The actor, 44, reveals in the April issue of GQ (on newsstands March 31) that Breaking Bad star Bryan Cranston was blunt with his advice: "It's hard, man. It's hard to let it go. It'll hit you a couple of different ways at different times."

The second trailer for Mad Men's final episodes was released Sunday night during the Oscars, and after seven seasons and countless hangovers with Don Draper and Co., we're still not quite ready to say goodbye.

As Don narrates a heartfelt pitch about nostalgia (from the Kodak commercial pitch during season one), we see flashbacks of some of the greatest moments throughout the show's history.

Mad Men returns this April to wrap up the story of Don Draper, and Jon Hamm says it's "trippy" to confront the end of an incredibly rich personal and professional era.

Though he's not a collector, Hamm – who graces the cover of the new issue of emmy magazine (out Feb. 17) – saved a picture of the script's final page that reads "End of Series."

After seven seasons playing the complex and troubled Draper, Hamm, 43, tells the magazine that he cried after the word "cut" signaled his final take last July 3. Like the typically stoic Don, though, he adds, "Everyone did."

Mad Men creator Matthew Weiner, who directed the series finale, says the last night of filming "was emotional and completely surreal because it was something we'd been anticipating – the mood of finishing the show had been hanging over all of us for months as the final scripts were coming in – and then, here we were at the moment."